/Engine/Source/Runtime/Core/Public/Misc/QualifiedFrameTime.h
Any subframe value in the frame time will be ignored. Whether or not the returned timecode is a drop-frame timecode will be determined by the qualified frame time's frame rate and the CVar specifying whether to generate drop-frame timecodes by default for supported frame rates.
[FTimecode](API\Runtime\Core\Misc\FTimecode) ToTimecode() const